Eyeglass frame blank processing apparatus

Abstract

The application relates to a mirror frame blank processing equipment, which comprises a rack, a cutter holder suspension beam fixedly arranged on the rack, a rotary cutter disc fixedly installed on the cutter holder suspension beam and used for loading a processing cutter, a clamping tool used for clamping a mirror frame blank to be processed, and a multi-axis motion mechanism used for driving the clamping tool to perform a composite motion of multiple translational degrees of freedom and multiple rotational degrees of freedom in a three-dimensional space, so that different parts of the mirror frame blank are moved to below the rotary cutter disc for processing. The mirror frame blank processing equipment designed by the application greatly reduces the inertia of the moving parts by adopting the structure of rotary cutter disc fixation and workpiece clamping tool motion, thereby effectively improving the processing speed and production efficiency; meanwhile, the arc feeding track executed by the multi-axis motion mechanism avoids the extrusion and damage of the traditional rigid set to the mirror frame blank, and improves the success rate and reliability of feeding.

Description

Technical Field

[0001] This application relates to the field of CNC machining equipment technology, and in particular to a mirror frame blank machining equipment. Background Technology

[0002] As a product that combines functionality and aesthetics, eyeglass frame blanks require extremely high precision in dimensional accuracy, surface finish, and production efficiency in their manufacturing. Currently, the industry commonly uses CNC machining centers to complete complex processes such as cutting, grooving, and drilling of eyeglass frame blanks.

[0003] Currently, conventional CNC equipment used for machining picture frame blanks typically employs a stacked structural layout. In this layout, the picture frame blank to be machined is fixed to the machine's work platform by a fixture, while the machining spindle, which integrates a motor, transmission system, and cutting tools, acts as a moving component, moving along a multi-axis (such as X, Y, and Z axes) motion system to machine the fixed picture frame blank.

[0004] However, machining spindles and their drive systems are typically large in mass and size. Using them as the primary moving parts results in a massive moment of inertia for the entire motion system. This significant inertia limits the maximum operating speed and acceleration / deceleration performance of the equipment. Especially in machining paths requiring frequent and rapid positioning, the excessively long idle travel time severely impacts the machining cycle time for individual products and overall production efficiency. Furthermore, the high-speed movement of heavy components can easily induce equipment vibration, adversely affecting machining accuracy. Utility Model Content

[0005] To address the aforementioned issues, this application provides a frame blank processing device that improves processing speed and production efficiency.

[0006] To achieve the above objectives, the frame blank processing equipment designed in this application includes: frame; The tool holder cantilever beam is fixedly mounted on the machine frame; A rotating cutter head is fixedly mounted on the tool holder cantilever beam for loading machining tools; A clamping fixture for holding the frame blank to be processed; and A multi-axis motion mechanism is used to drive the clamping fixture to perform a composite motion with multiple translational degrees of freedom and multiple rotational degrees of freedom in three-dimensional space, so that different parts of the frame blank can be moved to the underside of the rotary cutter head for processing.

[0007] Preferably, the clamping fixture is an internal expansion clamp that expands the inner frame contour of the frame blank to load the frame blank.

[0008] Preferably, the multi-axis motion mechanism is configured to drive the clamping fixture to perform a preset arc-shaped feeding trajectory when loading the frame blank, so as to load the frame blank.

[0009] Preferably, the arc-shaped feeding trajectory has a starting end and an ending end located within the inner frame of the frame blank. When the clamping fixture is located at the starting end, it is inclined relative to the frame blank, and when the clamping fixture is located at the ending end, it is horizontal relative to the frame blank. During the process of the clamping fixture moving from the starting end to the ending end, the top part of the clamping fixture first enters the inner frame of the frame blank, and then its posture gradually adjusts from the inclined posture to the horizontal posture, while the clamping fixture completely enters the inner frame of the frame blank.

[0010] Preferably, the rotary cutter head includes a disc body that can rotate about its central axis, and a plurality of tool holders distributed circumferentially along the disc body, wherein the plurality of tool holders are used to mount machining tools of different specifications or types.

[0011] Preferably, the disc body is provided with an air nozzle corresponding to the position of each of the tool holders, and the opening of the air nozzle faces the working area of ​​the corresponding machining tool.

[0012] Preferably, the multi-axis motion mechanism is a five-axis manipulator.

[0013] Preferably, the multi-axis motion mechanism includes an X-axis translation mechanism disposed on the tool holder suspension beam, a Z-axis lifting mechanism disposed on the X-axis translation mechanism, a Y-axis translation mechanism disposed on the Z-axis lifting mechanism, a first rotation mechanism disposed on the Y-axis translation mechanism, a loading seat disposed on the first rotation mechanism, and a second rotation mechanism disposed on the loading seat; the clamping fixture is disposed on the second rotation mechanism.

[0014] Preferably, the rotating cutter head is disposed on the front side of the tool holder suspension beam, and the X-axis translation mechanism, Z-axis lifting mechanism, and Y-axis translation mechanism are disposed on the rear side of the tool holder suspension beam; wherein, the loading seat extends from the rear side of the tool holder suspension beam to the front side of the tool holder suspension beam.

[0015] The frame blank processing equipment designed in this application, by adopting a structure of fixed rotating cutter head and moving workpiece clamping fixture, greatly reduces the inertia of moving parts, thereby effectively improving processing speed and production efficiency; at the same time, by using the arc feeding trajectory executed by the multi-axis motion mechanism, it avoids the squeezing and damage that traditional rigid sets may cause to the frame blank, and improves the success rate and reliability of feeding. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the frame blank processing equipment provided in the embodiments of this application.

[0017] Figure 2 yes Figure 1 Enlarged diagram of point A in the middle.

[0018] Figure 3 yes Figure 1 The front view.

[0019] Figure 4 This is a structural schematic diagram of the frame blank processing equipment provided in the embodiments of this application from another perspective.

[0020] Figure 5 yes Figure 1 Top view.

[0021] Figure 6 yes Figure 1 The left view.

[0022] Figure 7 This is an exploded view of the action of the clamping fixture loading the frame blank provided in the embodiment of this application.

[0023] Among them: starting end F1, ending end F2, frame blank 100, fixed fixture 200, frame 10, tool holder suspension beam 20, rotating tool disc 30, disc body 31, tool holder 32, air nozzle 33, clamping fixture 40, multi-axis motion mechanism 50, X-axis translation mechanism 51, Z-axis lifting mechanism 52, Y-axis translation mechanism 53, first rotation mechanism 54, loading seat 55, and second rotation mechanism 56. Detailed Implementation

[0024] The preferred embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0025] like Figures 1 to 7 As shown, the mirror frame blank 100 processing equipment described in this embodiment mainly includes a frame 10, a tool holder suspension beam 20 fixedly mounted on the frame 10, a rotary cutter head 30 fixedly mounted on the tool holder suspension beam 20, a clamping fixture 40 for clamping the mirror frame blank 100 to be processed, and a multi-axis motion mechanism 50 for driving the clamping fixture 40 to move.

[0026] Specifically, the frame 10 serves as the basic load-bearing structure, providing stable support for the installation of other components. The tool holder cantilever beam 20 can be an I-beam or similar structure, with both ends firmly fixed to the upper part of the frame 10, providing a mounting base for the rotary tool head 30. This suspended design provides ample operating space for the multi-axis motion mechanism 50 below and the workpiece processing area.

[0027] The rotary cutter head 30 is used to load machining tools. Specifically, it includes a disc body 31 that can rotate around its central axis, and multiple tool holders 32 distributed circumferentially along the disc body 31. These tool holders 32 are used to mount machining tools of different specifications or types, such as milling cutters and drill bits. During machining, when a tool change is required, the disc body 31 rotates, moving the designated tool holder 32 and its tool to the machining position directly below. Throughout the entire cutting process, the rotary cutter head 30 and its machining tools remain in a fixed position. Except for its rotational movement during tool changes, the rotary cutter head 30's position relative to the frame 10 in three-dimensional space remains constant.

[0028] The clamping fixture 40 is a component used to directly clamp the frame blank 100. In this embodiment, it is specifically an internal expansion clamp, the clamping end of which can extend into the inner frame contour of the frame blank 100, and then expand radially to firmly expand and clamp the frame blank 100 from the inside, so as to load the frame blank 100.

[0029] In this embodiment, the multi-axis motion mechanism 50 can be a five-axis robot, and the clamping fixture 40 is mounted on the end effector of the multi-axis motion mechanism 50. The multi-axis motion mechanism 50 is configured to drive the clamping fixture 40 to perform multiple translational degrees of freedom in three-dimensional space, such as movement in the X, Y, and Z directions, and multiple rotational degrees of freedom, such as a combination of oscillation and rotation about the X, Y, or Z axes, so that different parts of the frame blank 100 are moved under the rotary cutter head 30 for processing.

[0030] During operation, for example: before machining begins, the multi-axis motion mechanism 50 drives the clamping fixture 40 from a standby position to a loading position to load and fix the mirror frame blank 100 to be machined. After loading, the multi-axis motion mechanism 50 carries and drives the clamping fixture 40 and the mirror frame blank 100 on it to move below the fixed rotary cutter head 30 according to the milling path set by the CNC program. Through a translational degree of freedom and multiple rotational degrees of freedom, such as a compound motion of swinging and rotating around the X, Y, or Z axes, the target machining parts on the mirror frame blank 100, such as the temple connection, nose pad mounting hole, decorative groove, etc., can be accurately delivered to the stationary cutter above for cutting. When different processes are required, the rotary cutter head 30 rotates to change the corresponding cutter, while the mirror frame blank 100 continues to complete subsequent machining under the drive of the multi-axis motion mechanism 50.

[0031] By implementing the above methods, the heavy machining spindle in traditional equipment is transformed into a fixed component, while the lightweight workpiece moves, thereby greatly reducing the moment of inertia. This allows the equipment to achieve higher acceleration, deceleration, and movement speeds, effectively shortening the processing cycle.

[0032] In some embodiments, such as Figure 7 As shown, the multi-axis motion mechanism 50 is configured to drive the clamping fixture 40 to execute a preset arc-shaped feeding trajectory when loading the frame blank 100, thereby loading the frame blank 100. In specific implementation, as... Figure 2 and Figure 7 As shown, the frame blank 100 to be processed is transferred to a predetermined upper position by the fixed clamp 200 upstream of the equipment and kept stationary. Then, the multi-axis motion mechanism 50 drives the clamping fixture 40 to perform a preset arc feeding trajectory from bottom to top and fit it into the inner frame of the frame blank 100. This non-linear, arc-shaped motion path avoids the rigid impact that may be caused by the traditional linear feeding method, and completes the loading in a smoother and gentler way, thereby significantly reducing the risk of scratches or compression to the frame blank 100.

[0033] Specifically, such as Figure 7 As shown, the arc-shaped feeding trajectory defines a starting end F1 and a ending end F2 located within the inner frame of the frame blank 100. The starting end F1 is located outside the frame blank 100 to be processed and is the starting point of the feeding action. When the clamping fixture 40 is located at the starting end F1, its posture is inclined relative to the horizontal plane; for example, its top or front end can be slightly sunken to prepare for smooth entry into the inner frame of the frame blank 100. The ending end F2 is located at the center of the inner frame of the frame blank 100 or a preset clamping position and is the end point of the feeding action. When the clamping fixture 40 is located at the ending end F2, it has completely entered the inner frame of the frame blank 100, and its posture is adjusted to be horizontal, parallel to or adapted to the plane where the frame blank 100 is located, achieving a stable, pre-tightening clamping state.

[0034] As the multi-axis motion mechanism 50 drives the clamping fixture 40 from the starting end F1 to the ending end F2, the top part of the clamping fixture 40 first enters the inner frame of the frame blank 100, and then its posture gradually adjusts from an inclined posture to a horizontal posture, while the clamping fixture 40 is completely inserted into the inner frame of the frame blank 100. This fundamentally avoids the hard impact when the clamping fixture 40 is fitted into the inner frame of the frame blank 100.

[0035] In some embodiments, such as Figure 2 As shown, the disc body 31 is provided with air nozzles 33 corresponding to the positions of each tool holder 32, and the openings of the air nozzles 33 face the working area of ​​the corresponding machining tool. In this way, the air nozzles 33 are directly integrated into the rotating cutter disc 31 and correspond one-to-one with the tool holders 32. When the rotating cutter disc 30 switches tools, the corresponding air nozzles 33 automatically and accurately reach the optimal blowing position, without the need for any additional mechanical structure to move or adjust the air supply pipe, ensuring effective chip removal and effective cooling.

[0036] In some embodiments, such as Figures 3 to 6 As shown, the multi-axis motion mechanism 50 includes an X-axis translation mechanism 51 mounted on the tool holder suspension beam 20, a Z-axis lifting mechanism 52 mounted on the X-axis translation mechanism 51, a Y-axis translation mechanism 53 mounted on the Z-axis lifting mechanism 52, a first rotation mechanism 54 mounted on the Y-axis translation mechanism 53, a loading seat 55 mounted on the first rotation mechanism 54, and a second rotation mechanism 56 mounted on the loading seat 55; the clamping fixture 40 is mounted on the second rotation mechanism 56.

[0037] Specifically: The X-axis translation mechanism 51 is mounted on the tool holder suspension beam 20. It may include a fixed linear guide rail and a slider that can slide on the guide rail. The slider is connected to a servo motor through a ball screw. By controlling the rotation of the servo motor, all subsequent connected components can be driven to make precise linear translations in the left and right directions of the equipment.

[0038] The Z-axis lifting mechanism 52 is mounted on the slider of the X-axis translation mechanism 51. Its structure is similar to that of the X-axis translation mechanism 51, but its guide rail is arranged vertically to drive the connected components to move up and down along the Z-axis direction, that is, the vertical direction.

[0039] The Y-axis translation mechanism 53 is mounted on the moving parts of the Z-axis lifting mechanism 52. Its guide rail direction is usually perpendicular to the X-axis direction, and it is used to achieve linear movement along the Y-axis direction, for example, the back-and-forth direction of the equipment. Thus, through the coordinated action of the X, Y, and Z translation mechanisms, the clamping fixture 40 can be positioned at any point in the three-dimensional Cartesian coordinate system.

[0040] Meanwhile, to achieve posture adjustment, the first rotating mechanism 54 is installed at the end of the Y-axis translation mechanism 53. It can be a rotary table driven by a servo motor, used to rotate or swing the component mounted on it around an axis, thereby changing the tilt posture of the frame blank 100 to be processed. In addition, a loading seat 55 is provided on the first rotating mechanism 54. As a structural connector, one end of the loading seat 55 is connected to the first rotating mechanism 54, and the other end provides a mounting base for the subsequent second rotating mechanism 56. The second rotating mechanism 56 is mounted on the loading seat 55. Its structure is similar to that of the first rotating mechanism 54, but its rotation axis is usually orthogonal to the axis of the first rotating mechanism 54. It is used to realize the rotation of the clamping fixture 40 itself, so as to realize complex linkage processing of arbitrary curved surfaces of the frame blank 100.

[0041] In some embodiments, such as Figure 6As shown, the rotating cutter head 30 is disposed on the front side of the tool holder suspension beam 20, and the X-axis translation mechanism 51, the Z-axis lifting mechanism 52, and the Y-axis translation mechanism 53 are disposed on the rear side of the tool holder suspension beam 20; wherein, the loading seat 55 extends from the rear side of the tool holder suspension beam 20 to the front side of the tool holder suspension beam 20.

[0042] In this way, the tool holder cantilever beam 20 not only serves as a load-bearing structure but also divides the equipment into front and rear areas. Specifically, the rotary cutter head 30 is located on the front side of the tool holder cantilever beam 20. This front area is the working area directly facing the operator and performing cutting operations. Placing the rotary cutter head 30 in this area allows for the most direct and convenient processing of the frame blank 100 fed by the clamping fixture 40 below. Correspondingly, the main parts of the multi-axis motion mechanism 50 responsible for large-range movement, namely the X-axis translation mechanism 51, the Z-axis lifting mechanism 52, and the Y-axis translation mechanism 53, are concentrated on the rear side of the tool holder cantilever beam 20. This rear area can be considered as the equipment drive area. A retractable partition plate (not shown) can be installed between the front working area and the rear drive area. The loading seat 55 passes through the partition plate to isolate the chips splashed during processing in the front working area without affecting its operation. This avoids the erosion and contamination of these contaminants on key components such as guide rails and lead screws in the rear drive area, greatly improving the long-term stability and service life of the equipment.

[0043] The frame blank processing equipment provided in this application adopts a structure with a fixed rotating cutter head and a moving workpiece clamping fixture, which greatly reduces the inertia of the moving parts, thereby effectively improving the processing speed and production efficiency. At the same time, the arc feeding trajectory executed by the multi-axis motion mechanism avoids the squeezing and damage that traditional rigid sets may cause to the frame blank, and improves the success rate and reliability of feeding.

[0044] In the description of this application, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0045] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0046] Finally, it should be noted that the above descriptions are merely preferred embodiments of this application and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A frame blank processing equipment, characterized in that, include: frame; The tool holder cantilever beam is fixedly mounted on the machine frame; A rotating cutter head is fixedly mounted on the tool holder cantilever beam for loading machining tools; Clamping fixture, used to clamp the frame blank to be processed; as well as A multi-axis motion mechanism is used to drive the clamping fixture to perform a composite motion with multiple translational degrees of freedom and multiple rotational degrees of freedom in three-dimensional space, so that different parts of the frame blank can be moved to the underside of the rotary cutter head for processing.

2. The frame blank processing equipment according to claim 1, characterized in that, The clamping fixture is an internal expansion clamp, which expands the inner frame contour of the frame blank to load the frame blank.

3. The frame blank processing equipment according to claim 2, characterized in that, The multi-axis motion mechanism is configured to drive the clamping fixture to perform a preset arc-shaped feeding trajectory when loading the frame blank, so as to load the frame blank.

4. The frame blank processing equipment according to claim 3, characterized in that, The arc-shaped feeding trajectory has a starting end and an ending end located in the inner frame of the frame blank. When the clamping fixture is located at the starting end, it is in an inclined posture relative to the frame blank. When the clamping fixture is located at the ending end, it is in a horizontal posture relative to the frame blank. During the process of the clamping fixture moving from the starting end to the ending end, the top part of the clamping fixture first enters the inner frame of the frame blank, and then its posture gradually adjusts from the inclined posture to the horizontal posture, while the clamping fixture completely enters the inner frame of the frame blank.

5. The frame blank processing equipment according to claim 1, characterized in that, The rotary cutter head includes a disc body that can rotate about its central axis, and a plurality of tool holders distributed circumferentially along the disc body, wherein the plurality of tool holders are used to mount machining tools of different specifications or types.

6. The frame blank processing equipment according to claim 5, characterized in that, The disc body is provided with an air nozzle corresponding to the position of each of the tool holders, and the opening of the air nozzle faces the working area of ​​the corresponding machining tool.

7. The frame blank processing equipment according to claim 1, characterized in that, The multi-axis motion mechanism is a five-axis manipulator.

8. The frame blank processing equipment according to claim 1, characterized in that, The multi-axis motion mechanism includes an X-axis translation mechanism mounted on the tool holder suspension beam, a Z-axis lifting mechanism mounted on the X-axis translation mechanism, a Y-axis translation mechanism mounted on the Z-axis lifting mechanism, a first rotation mechanism mounted on the Y-axis translation mechanism, a loading seat mounted on the first rotation mechanism, and a second rotation mechanism mounted on the loading seat; the clamping fixture is mounted on the second rotation mechanism.

9. The frame blank processing equipment according to claim 8, characterized in that, The rotating cutter head is located on the front side of the tool holder suspension beam, and the X-axis translation mechanism, Z-axis lifting mechanism, and Y-axis translation mechanism are located on the rear side of the tool holder suspension beam; wherein, the loading seat extends from the rear side of the tool holder suspension beam to the front side of the tool holder suspension beam.

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